Poor Service @ Burger King Soweto Rockville

I want to register my disappointment with the service from BK Soweto (Rockville).

Drive through got my order incorrect, twice. I had to drive back to collect my nacho cheese loaded fries which I had paid for but not received.

They served us warm drinks, when I went inside to complain the front manager apologized and explained that they were out of ice.

When I asked to speak to the manager, front staff asked me to call the number on my receipt. I spoke to a lady named Hlamalani who was very abrupt and rude. She avoided taking responsibility for the mishaps and disservice, she instead wanted to justify that the store was short staffed and the store had ran out of ice. I'm sorry but all these excuses have nothing to to do with me as a customer. The manager's attitude was immature and showed deferred responsibility (not sure why she is even in this role) .

NB: I'm a loyal BK customer who eats at BK at ;east once a week at my local store (Mall @ Carnival) and I can attest that their service is 100% better than the service in Soweto. Why does BK set lower standards for customers in Soweto? Is their money less valuable than money from customers from the suburbs? Does it depend on who is on duty to experience best service?